Finally, we note that we tune lr, wd, and dp on the COCO 2017 val split and report results on the same split. While technically not an ML best-practice, a multitude of comparisons on COCO val test-dev results over many years demonstrate that overfitting in not a concern for this kind of low-degree-of-freedom hyperparameter tuning., Table 2 in [1]} (version 1) shows that text-dev AP\(^\text{box}\)  is systematically higher than val AP\(^\text{box}\)  in seven system-level comparisons.
